Oh man I was literally just thinking about how I hadn't seen an updated myotismon deck list

Not bad. Honestly, if I were to digivolve the mummymon to malo, I’d use the Myotismon ace effect to resurrect the Arukeni and mummy tamer to trigger the on deletion effect again. I have seen other builds where they use a yellow egg and bt2 Salamon to enable flame hellscythe. Ex6 will be bringing Witchmon and Lilithmon that do help this deck a bunch in terms of defence. We also have the upcoming Promo; Myotismon X, which can help a lot. Finally, we have Ex8 on the horizon which just revealed the theme of Nightmare soldiers, citing Piedmon and Myotismon. For those in the know (eg Survive players), that easily means Boltboutamon will be the boss.